The yield of DL aspartic acid was above 70% by improve the previous process and the waste can be reduced by acidified the reaction solution with maleic acid substituting hydrochloric acid.

• 通过实验研究对原有合成工艺作出了改进,使产品收率提高到70%25以上,并且对产品的分离提纯采用顺丁烯二酸(马来酸)代替盐酸进行酸化结晶从而提高了反应物的利用和减少反应剩余物的污染。